(0 20 9 7 4)(1 18 2)(3 14 12 10 5)(6 11 8)(13 17 15)(16 21 19)
ALLOWS (11/8)-SEQUENCE
1: (0 4 7)
(0 4 20 9 7)(1 18 2)(3 14 12 10 5)(6 11 8)(13 17 15)(16 21 19)
2: (3 10 5)
(0 4 20 9 7)(1 18 2)(3)(5)(6 11 8)(10 14 12)(13 17 15)(16 21 19)
3: (6 11 8)
(0 4 20 9 7)(1 18 2)(3)(5)(6)(8)(10 14 12)(11)(13 17 15)(16 21 19)
4: (0 4 7)
(0)(1 18 2)(3)(4)(5)(6)(7 20 9)(8)(10 14 12)(11)(13 17 15)(16 21 19)